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pte-book3e.h
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1 #ifndef _ASM_POWERPC_PTE_BOOK3E_H
2 #define _ASM_POWERPC_PTE_BOOK3E_H
3 #ifdef __KERNEL__
4 
5 /* PTE bit definitions for processors compliant to the Book3E
6  * architecture 2.06 or later. The position of the PTE bits
7  * matches the HW definition of the optional Embedded Page Table
8  * category.
9  */
10 
11 /* Architected bits */
12 #define _PAGE_PRESENT 0x000001 /* software: pte contains a translation */
13 #define _PAGE_FILE 0x000002 /* (!present only) software: pte holds file offset */
14 #define _PAGE_SW1 0x000002
15 #define _PAGE_BAP_SR 0x000004
16 #define _PAGE_BAP_UR 0x000008
17 #define _PAGE_BAP_SW 0x000010
18 #define _PAGE_BAP_UW 0x000020
19 #define _PAGE_BAP_SX 0x000040
20 #define _PAGE_BAP_UX 0x000080
21 #define _PAGE_PSIZE_MSK 0x000f00
22 #define _PAGE_PSIZE_4K 0x000200
23 #define _PAGE_PSIZE_8K 0x000300
24 #define _PAGE_PSIZE_16K 0x000400
25 #define _PAGE_PSIZE_32K 0x000500
26 #define _PAGE_PSIZE_64K 0x000600
27 #define _PAGE_PSIZE_128K 0x000700
28 #define _PAGE_PSIZE_256K 0x000800
29 #define _PAGE_PSIZE_512K 0x000900
30 #define _PAGE_PSIZE_1M 0x000a00
31 #define _PAGE_PSIZE_2M 0x000b00
32 #define _PAGE_PSIZE_4M 0x000c00
33 #define _PAGE_PSIZE_8M 0x000d00
34 #define _PAGE_PSIZE_16M 0x000e00
35 #define _PAGE_PSIZE_32M 0x000f00
36 #define _PAGE_DIRTY 0x001000 /* C: page changed */
37 #define _PAGE_SW0 0x002000
38 #define _PAGE_U3 0x004000
39 #define _PAGE_U2 0x008000
40 #define _PAGE_U1 0x010000
41 #define _PAGE_U0 0x020000
42 #define _PAGE_ACCESSED 0x040000
43 #define _PAGE_LENDIAN 0x080000
44 #define _PAGE_GUARDED 0x100000
45 #define _PAGE_COHERENT 0x200000 /* M: enforce memory coherence */
46 #define _PAGE_NO_CACHE 0x400000 /* I: cache inhibit */
47 #define _PAGE_WRITETHRU 0x800000 /* W: cache write-through */
48 
49 /* "Higher level" linux bit combinations */
50 #define _PAGE_EXEC _PAGE_BAP_UX /* .. and was cache cleaned */
51 #define _PAGE_RW (_PAGE_BAP_SW | _PAGE_BAP_UW) /* User write permission */
52 #define _PAGE_KERNEL_RW (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY)
53 #define _PAGE_KERNEL_RO (_PAGE_BAP_SR)
54 #define _PAGE_KERNEL_RWX (_PAGE_BAP_SW | _PAGE_BAP_SR | _PAGE_DIRTY | _PAGE_BAP_SX)
55 #define _PAGE_KERNEL_ROX (_PAGE_BAP_SR | _PAGE_BAP_SX)
56 #define _PAGE_USER (_PAGE_BAP_UR | _PAGE_BAP_SR) /* Can be read */
57 
58 #define _PAGE_HASHPTE 0
59 #define _PAGE_BUSY 0
60 
61 #define _PAGE_SPECIAL _PAGE_SW0
62 
63 /* Flags to be preserved on PTE modifications */
64 #define _PAGE_HPTEFLAGS _PAGE_BUSY
65 
66 /* Base page size */
67 #ifdef CONFIG_PPC_64K_PAGES
68 #define _PAGE_PSIZE _PAGE_PSIZE_64K
69 #define PTE_RPN_SHIFT (28)
70 #else
71 #define _PAGE_PSIZE _PAGE_PSIZE_4K
72 #define PTE_RPN_SHIFT (24)
73 #endif
74 
75 #define PTE_WIMGE_SHIFT (19)
76 #define PTE_BAP_SHIFT (2)
77 
78 /* On 32-bit, we never clear the top part of the PTE */
79 #ifdef CONFIG_PPC32
80 #define _PTE_NONE_MASK 0xffffffff00000000ULL
81 #define _PMD_PRESENT 0
82 #define _PMD_PRESENT_MASK (PAGE_MASK)
83 #define _PMD_BAD (~PAGE_MASK)
84 #endif
85 
86 #endif /* __KERNEL__ */
87 #endif /* _ASM_POWERPC_PTE_FSL_BOOKE_H */